When Keyaru acquired his powers as a Hero who specialised in healing all injuries regardless of severity, it appeared that he would stroll the path to an ideal future. However what awaited him instead was nice agony; he was subjected to years of seemingly infinite hellish torture and abuse. Keyaru’s healing expertise allowed him to secretly acquire the memories and abilities of these he treated, step by step making him stronger than anybody else. However by the time he reached his full potential, it was far too late—he had already lost every little thing.
Determined to put his life again on track, Keyaru decided to unleash a strong healing spell that rewound the whole world again to the time earlier than he started to endure his horrible destiny. Outfitted with the anguish of his previous, he vows to redo the whole lot in order to fulfill a brand new goal—to actual revenge upon those that have wronged him.